Piston movement control device



Feb. 24, 1953 A, H, KRAUSE 2,629,327

PISTON MOVEMENT CONTROL DEVICE Filed Nov. 13, 1948 i mm 23 I i. w FE? 25l I g: sa 32 f sa Flal 26 n M l sa f 25 f (lll/171141111 fr/ 204 I8 u' i'I #L-i 1 l FIG. 5 26 24 23 L 23' FIG. 2 INVENToR. 3' ALBERT H. KRAUSEuw b//MW Gl'torrLejs Patented Feb. 24, 1953 vPISTON MOVEMENT CONTROLDEVICE Albert H. Krause, East Cleveland, l1`io,'assignor `to TheCarpenter Manufacturing Corporation, Cleveland, Ohio, accorporationoli-Ohio Application November 13, 1948, .Serial No. 59,921

Claims. l

This invention relates `to piston movement con- 4troldevices, especiallyto a handle or lever arm .that-.is pivotally associated `with a pistonmember for reciprocation of the pistonby arcuate move- :ment of thecontrol handle.

The generallobject of the present invention is vto `provide -a sturdy,adjustable piston control `handleaof novel construction.

Anotherobject ofthe invention .is to provide a piston Vcontrol `devicewhereby the .action ,pro-

Hduced through movement of the device through a `givenarc `can producewidely varying move- 'ment of an associated piston. t

Another objectfof the invention'istoprovide a piston control device`formed from a minimum of tparts `and one which Visadapted to have along vservice life` with a minimum ofA maintenance.

Aiurther object of the invention is to provide a device of the typeindicated above with a removable handle or control member.

Yet .another .object of the invention is to pro- `videa'snuglypositioned connectorllink and con- .the .principles .ofthelinvention;

Fig. 2 is an end elevation, partially broken away, taken on the line 2.2 of Fig. l

Fig. 3 Ais a vertical section taken on the line .3-30f Fig. 2;

Fig. 4 is a horizontal section taken 'on the line 4-4 of Fig. 3; and

Fig. 5 is a `"fragmentary vertical section of a modification of thecontrol device of the invention.

The piston control deviceof theinvention is .generally indicated by thenumeral I9 and is shown in detail in the accompanying drawings. Thisdevice .I 9 includes a frame having two longitudinally.extendingplates IIand I2 and a piston .receiving cylinder` I3is suitablyassociated withor Vsecured to the plates Il and I2 with the cylinder being positioned`intermediate such plates. This "cylinder I3.may-beof the type disclosedin `Christenson Patent No. 2,410,808 although other cylinders and.pistoni constructions may be substituted therefor, when desired. In.all events, a

.suitable piston (not shown) is received in `the cy1inder`l3 and has apistonrod Iii-secured thereto with one end of such rod protruding nfromthe cylinder I3.

In order to `anchor a'control handle for the piston rod I4 onto thedevice I 0, a fulcrum pin `I 5 is secured in a fixed position inthedevice I0. This pin I5 is shown as including a tube I6 through which abolt I1 extends with the bolt I 'I being secured between the `frameplates `I'I and `I2. A yoke I8 which has two parallel arms I9 extendingfrom a baseportion Z'U'thereof ispivotally carried by the fulcrum pin I5with the free ends of the yoke arms I9 being secured thereto inanyconvention-al manner. The yoke I`8` hasla sleeve 2| secured to thebase29 thereof and extending outwardly therefrom in a direction oppositelyto the direction that the arms VI 9` extend from such base. 'Ihis sleeve2I usually is welded 'to' the yoke I8 and protrudes only a shortdistance therefrom. The sleeve 2I also positions a tubular member 22which protrudes from the-sleeve 2l an appreciable distance at both endsvthereof and with the inner end of'such member `221norm=ally protrudingthrough the base 29 of the yoke.

A pair oflinks 23 is pivotally secured to -the exposed end of thepistonrod I4'vby apin 24 with one link being located adjacent each of 4twodiametrically opposed portions of the piston rod. These links 23 areconnected in a vertically 'adjustable manner to the'yoke I8 for varyingthe piston stroke upon movement of the yoke "I8 through a ,predeterminedlimited arcuate movevThese connecting means 'are shown las comprisingaslide block 25 which is engaged with each of the `arms I9 with eachblock 25 having 'a pair of laterally protruding portions 26 and 2thatsnuglyengage with the sides of the arms I9.

Thus the slide blocks 25 Vare carried by thearms Asuch slide blockscontrol the position of the links 23 with relation to the piston rod I4dueto such .links 23 being connected adjacent its ends betweenthe pins24 and 29.

The vertical position of .the Acontrol blo'ck'28 is determined by. meansof .a control rod 30 nwhich is received within the tubular Vmember '122and tween.

33 prevents relative longitudinal movement be-V tween the sleeve 2l, ortubular member 22, and

the control rod 30. However, relative rotational movement between suchmembers is still permitted. Thus, by rotating the control rod 30, thevertical position of the slide blocks 25 can be varied by movement ofthe control block 28 and the effective stroke produced on 'the pistonrod 1|4 may be changed within desired predetermined imits. '2

.f- UfsuallyV some type of a gripvdeviceV or handle -is'provided for theouter or upper end of the control rod 30 and a tubular handle 35 isshown secured to this portion of the rod 30 by means of a set screw 35.Fig. lV of the drawings best shows that the tubular handle 35 may alsoencompass a portion of the tubular member 22 but,

ofcourse, the handle 35 will be rotatable with relation to such member.

A modiiied form of the control device of the in- `vention is shown inFig. 5 and it includesa yoke V|| that has a sleeve |2| secured theretoand extending therefrom in both directions from the base* of the yoke.In this instance, a lower section |30'of the control rod is provided andis engaged withra tapped hole in a control block |28.v The controlrod'section |30 has a circum- Yferentially *extending recess 200 formedin its periphery and a set screw 20| or other similar v`locking memberis engaged with the sleeve |2| and is received in a portion of therecess 200 to Vpermit relative rotational movement between such memberswhile retaining them in vgiven longitudinal relationship.

A.A second portion of the control rod is provided and such control rodsection 202 has a tongue 203 formed thereon for engagement with a recess204 provided in the end of the section |30 whereby the control rodsections are longitudinally abutted and torsional forces are transmittedtherebe- AV tubular member |22 is positioned around the controlrod'section 202 and it extends axially within the sleeve |2|. Thetubular member. |22 is removably secured to the sleeve |2| by a setscrew -I23 or.. similar member whereby a removable handle member isprovided for this embodiment of the invention. Since the tubular member|22 and control rod section 2132 may be of appreciable length, thisconstruction permits the operating handle to be removed from the pumpcontrol device when same is not to be op- 60 Verated. Again, a set screw|24, or equivalent,

isengaged with the tubular member |22 and protrudes into a portion of arecess 205 formed in the peripheryV of the section 202 to retain suchmembers in a xed longitudinal relationship.

From the foregoing, it will be seen that a xed pivot or fulcrum memberis provided in the apparatus and that the position of an operatinghandle is determined by such xed or fulcrum member. Means are providedfor adjusting the 70 position of a connector link extending between theoperating handle and a piston member wherebythe effective throw of theoperating handle can be varied, as desired, within the adjustment limitsof the'apparatus.

In the drawings, Fig. 3 shows the control block being positioned at itslower extremity of movement whereas the other views of the drawing showsuch block 28 at its uppermost position. It

5 will be realized that the slide blocks and control block function as aunit and that in some instances it may even be desirable to have suchblocks formed as a unit which engages with one end portion of a linkthat connects to the piston.

Likewise, the link may extend directly to the piston rather thanconnecting to a piston rod.

From the foregoing it should be apparent that an adjustable handle orcontrol device has been provided for regulating the stroke of a pistonproduced by uniform movement of the control handle through apredetermined arc. `It also will be noted that as the slide block 28moves down closer to the fulcrum I5, the force set up on the links23---will be increased. Thus thelowermost position` of the block 28 issubstantially in alignment with the longitudinal axis of the piston rod|.4 whereas the upper position of the slide block has the link 23extending at a Y greater angle of inclination with relation to the '25axis of the piston rod. Such a positioning of the elements of theinvention facilitates transfer of the force to the piston rod. Also agreater length Stroke of the piston rod is produced when the block 28 isat its uppermost position so that a S0 maximum volume will be pumped inthe cylinder i3 when relatively low pressures-are Vbeing suppliedthereto and this volume of material pumped decreases as the pressurethereon increases.' By use of the tubular handle 35, force istransmitteddirectly from it to the tubular member 22 and then to the sleeve 2| andyoke |8. As the control rod 30 is freely received within the tubularmember 22, the control rod has no pumping forces set up thereon wherebyadjustment ofv the posi- 40 tion of the slide block 2a is facnitatedsince the control rodrcannot be deformedA by operating pressures.Likewise, it should be noted that the links 23 extend the width or depthof the control block 28 to provide for solid positioning of such linksand the blocks with which they are associated.

While two complete embodiments of the invention have been disclosedherein, it will be appreciated that modication of these particularembodiments of the invention may be resorted to without departing fromthe scope of the invention as defined by the appended claims.

Having thus described my invention, what 1 claim is:

V1. A piston control device comprisng a frame,

a cylinder secured to said frame, a piston secured in said cylinder, apiston rod secured to said piston and extending from said cylinder, afulcrum pin secured to said frame adjacent the end of said piston rodbut spaced longitudinally outwardly of said frame from said rod, a yokehaving a base and parallel arms extending therefrom with such armspivotally engaged with Said fulcrum pin, a tubular member secured to the6 base of said yoke and extending outwardly from same along thelongitudinal centerline of said yoke in a direction oppositely from saidarms, a slide block slidably engaged with each arm of said `yoke formovement therealong, a link pivotally connected to the end of saidpiston rod, a control block pivotally engaged with one portion of saidlink and engaged with and extending between said slide blocks, a controlrod having a threaded lower portion positioned in said tubular memberand extending therefrom at each end, said control rod extending throughthe base of said yoke and having the threaded portion thereof engagedwith said control block, said control rod being the operating handle formoving said piston, a handle member secured to said control rod at theendl thereof remote from said yoke, and means securing said control rodto said tubular member to prevent relative longitudinal movementthereof? and to permit rotational movement of said control rod wherebythe position of said slide blocks on said yoke and the position andaction offsaid link can be varied by rotation of said handle member.

2. Aw-'device as in claim 1 wherein said slide blockseach has sideportions snugly engaging the lateral edges of the arms of said yoke, apair of links are provided, and said control block has pin meansextending from opposite portions of same and with each pin meansengaging with one offsaid links and one slide block.

3. A' piston control device comprising a frame j having a pistoncylinder therein, a piston in said cylinder, a'piston rod secured tosaid piston and extending from said cylinder, a fulcrum pin secured'L-tosaid frame adjacent the end of said piston rod but spaced longitudinallyoutwardly of said frame from said rod, a yoke having a base andarmsextending therefrom with such arms pivotally engaged with said fulcrumpin, a tubular member secured to said yoke and extending outwardly fromsame along the longitudinal centerline` of said yoke oppositely fromsaid arms, a i

slide `block slidably engaged with each arm of said yoke for movementtherealong, a link piv- Y otallyconnected to the end of said piston rod,a

control block pivotally engaged with one portion v of said link andengaged with and extending betweensaid slide blocks, a control rodhaving a threaded lower portion positioned in said tubular member andextending therefrom at each end, said control rod having the threadedportion thereof engaged with said control block, a handle member securedto said control rod at the end extending therefrom with such armspivotally engaged with said fulcrum pin, a tubular member secured to thebase of said yoke and extending outwardly from same along thelongitudinal centerline of said yoke oppositely to the arms thereof, aslide block slidably engaged with each arm of said yoke for movementtherealong, a link one portion of which is adapted to be pivotallyconnected to a piston, a control block pivotally engaged with a secondportion of said link and engaged with and extending between said slideblocks, a control rod having a threaded lower portion positioned in saidtubular member and extending therefrom at each end, said control rodextending through the base of said yoke and having the threaded portionthereof engaged with a tapped hole in said control block, Said controlrod being an operating handle for moving a piston, and means securingsaid control rod to said tubular member to prevent relative longitudinalmovement thereof and to permit rotational movement of said control rodwhereby the position of said slide blocks on said yoke can be varied tochange the position and action of 25 said link.

5. A device as in claim 4 wherein said control rod is formed in twolongitudinally abutted sections with the abutting ends adapted to engageremovably with each other, said tubular member extends over the jointformed in said control rod, a second tubular member is positioned overthe said control rod and overlaps the end of said tubular member andextends to a point spaced longitudinally inwardly of the end of suchrod, and means are provided for removably securing said tubular memberstogether.

ALBERT H. KRAUSE.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number

